Left. Mirror outside nut. Right. A Nut used to retain the Fuse and Relay Center to it's mounting point. A solid metal or plastic block with a threaded hole in the Center which is used to secure the Instrument Panel Air Bag Inflator Module to its mounting point. A solid metal or plastic block with a threaded hole in the Center which is used to tighten or adjust the ABS Hydraulic Control Unit. A solid metal or plastic block with a threaded hole in the Center which is used to tighten or adjust the Fuel Pump Driver Module. Door Check Nut. Door Mirror Nut. Engine Air Intake Hose Nut. Nut to secure bumper cover. Windshield Wiper Linkage Nut.